arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.4748math.AG
收藏

光谱覆盖的Prym簇

Prym varieties of spectral covers

Tamás Hausel, Christian Pauly

摘要:

给定光滑射影复曲线C上的一个可能的可约和非可约谱覆盖X,我们确定Prym簇Prym(X/C)的连通分支群。作为直接的应用,我们证明了C的Jacobian的n-扭点的有限群对扭SL_n-Higgs模空间的上同调的作用达到拓扑镜像对称所预言的程度。特别地,这给出了Harder-Narasimhan的一个结果的新证明,证明了这个有限群平凡地作用于扭SL_n稳定丛模空间的上同调.

英文摘要:

Given a possibly reducible and non-reduced spectral cover X over a smooth projective complex curve C we determine the group of connected components of the Prym variety Prym(X/C). As an immediate application we show that the finite group of n-torsion points of the Jacobian of C acts trivially on the cohomology of the twisted SL_n-Higgs moduli space up to the degree which is predicted by topological mirror symmetry. In particular this yields a new proof of a result of Harder--Narasimhan, showing that this finite group acts trivially on the cohomology of the twisted SL_n stable bundle moduli space.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑